Objects missing in view window
You have unlinked the layers for the 3D views, so different layers are appearing in different 3D Views. To re-link them make sure the Lock camera and layers button is checked in the header of the 3D View:



You also have your objects on different layers, so upon enabling Lock camera and layers, one or more of your objects may disappear as the other 3D views will now only be displaying a single layer. The 20 squares, arranged in a grid, to the left of the red box in the screenshot are your layers. You can move objects between layers by selecting an object, pressing M and selecting a layer or view different layers by clicking one of the squares.

See the Layers section of the Blender Manual for more information on managing and viewing layers.